<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :show-file-list="false"
      :headers="headers"
      :file-list="fileList"
      :class="{ hide: fileList.length >= limit }"
      :disabled="disabled"
      :input-type="inputType"
    >
      <i class="el-icon-plus"></i>
    </el-upload>

    <div v-if="fileList.length">
      <div v-for="(item, index) in fileList" :key="index">
        <video :src="item.url" style="display: block; max-width: 100%; margin: 0 auto" controls />
        <i
          class="el-icon-delete"
          @click.stop="handleDelete(item)"
          style="float: right; margin-top: 16px; font-size: 20px; color: red; cursor: pointer"
        />
      </div>
    </div>

    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      <div v-if="tip">{{ tip }}</div>
      <div v-else>
        建议：支持
        <b style="color: #f56c6c">{{ fileType.join('/') }}</b
        >格式， 视频大小<b style="color: #f56c6c">{{ fileSize }}MB</b>以内
      </div>
    </div>
  </div>
</template>

<script>
import { getToken } from '@/utils/auth';

export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 1,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 100,
    },
    fileType: {
      type: Array,
      default: () => ['mp4'],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
    tip: {
      type: String,
      default: '',
    },
    // 是否不可编辑
    disabled: {
      type: Boolean,
      default: false,
    },
    // 多张图片传入后端值类型，separator:用逗号分隔，json：json字符串
    inputType: {
      type: String,
      default: 'separator',
    },
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      dialogImageUrl: '',
      dialogVisible: false,
      hideUpload: false,
      baseUrl: process.env.VUE_APP_BASE_API,
      baseImg: process.env.VUE_APP_IMG_PRE,
      uploadImgUrl: process.env.VUE_APP_BASE_API + '/common/uploadObsFile', // 上传的图片服务器地址
      headers: {
        Authorization: 'Bearer ' + getToken(),
      },
      fileList: [],
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          let list = [];
          if (Array.isArray(val)) {
            list = val;
          } else if (checkJson(val)) {
            list = JSON.parse(val);
          } else {
            list = this.value.split(',');
          }
          // 然后将数组转为对象数组
          this.fileList = list.map((item) => {
            item = { name: item, url: item };
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
        function checkJson(val) {
          try {
            JSON.parse(val);
            return true;
          } catch (error) {
            return false;
          }
        }
      },
      deep: true,
      immediate: true,
    },
  },
  model: {
    prop: 'value',
    event: 'inputs',
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = '';
        if (file.name.lastIndexOf('.') > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1);
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf('image') > -1;
      }

      if (!isImg) {
        this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join('/')}视频格式文件!`);
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传视频大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading('正在上传视频，请稍候...');
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.uploadList.push({ name: file.name, url: res.data.url });
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.imageUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除视频
    handleDelete(file) {
      const findex = this.fileList.map((f) => f.name).indexOf(file.name);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit('inputs', this.listToString(this.fileList));
      }
    },
    // 上传失败
    handleUploadError() {
      this.$modal.msgError('上传视频失败，请重试');
      this.$modal.closeLoading();
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit('inputs', this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      if ('json' === this.inputType) {
        let imgList = [];
        console.log(list);
        list.forEach((item) => {
          if (item.url) {
            imgList.push(item.url);
          }
        });
        console.log(imgList);
        return JSON.stringify(imgList);
      } else {
        let strs = '';
        separator = separator || ',';
        for (let i in list) {
          if (list[i].url) {
            strs += list[i].url.replace(this.baseUrl, '') + separator;
          }
        }
        return strs != '' ? strs.substr(0, strs.length - 1) : '';
      }
    },
  },
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}

// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
::v-deep .el-upload-list__item-thumbnail {
  object-fit: contain !important;
}
</style>
